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DTIC ADA035848: Digital Encoding for Secure Data Communications

by: Defense Technical Information Center

Publication date: 1976-09-01

Topics: DTIC Archive, Rondon, Eduardo Emilio Coquis, NAVAL POSTGRADUATE SCHOOL MONTEREY CA, *CODING, *SECURE COMMUNICATIONS, *CRYPTOGRAPHY, COMPUTER PROGRAMMING, THESES, PSEUDO RANDOM SEQUENCES, NOISE, ERROR CORRECTION CODES, DATA TRANSMISSION SYSTEMS, DECODING, COMPUTERIZED SIMULATION,

Collection: dticarchive; additional_collections

Language: English

This thesis is concerned with the use of the digital computer to realize cryptography. Three cryptographic systems: simple substitution, pseudo-random cipher (polyalphabetic cipher), and data-keyed cipher, are designed, implemented through computer programming, and evaluated. A suitable cyclic error correcting code is designed to encode these systems for transmission. The code is tested by simulating a noisy channel.